Mold for tubular articles



(No Model.) 2 Sheets--Sheet 1.

S. J. ADAMS.

MOLD PoR TUBULAR ARTICLES. No. 433,590. Patented Aug. 5, 1890.

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2 Sheets Sheet 2.

(No Model.)

S. J. ADAMS.

MOLD Poe TUBULAR ARTICLES.

No. 433,590. Patented Aug. 5, 1890.

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UNITED STATES PATENT OFFICE.`v

STEPHEN .IARVIS ADAMS, OE PITTSBURG, PENNSYLVANIA.`

MOLD FOR TUB-ULAR ARTICLES.

SPECIFICATION forming part of Letters Patent No. 433,590, dated August 5, 1890.

Application filed January 1s, 1890. serial no. 336,772. (No model.)

lTo all whom, it may concern.-

Be it known that I, STEPHEN JARvrs ADAMS, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have in-i articles-such as wagon-boxes, pipe -balls,

imits object being to provide for the placing of a large number of molds in the same fiask and of pouring the same from the base of the mold-cavities, as well as to form the runners to the several mold-cavities and to properly center the cores therein.

To these ends my invention comprises, generally stated,a mold for tubular articles having formed in the same body of sand a series of mold-cavities, a pouring-gate extending vertically through the body of sand and communicating at its lower end with the several mold-cavities, a core-seat below said pouringgate and mold-cavities, and a bottom core adapted to fit within said core-seat and having a number of seats therein corresponding to the mold-cavities for the reception of the lower ends of the core-prints.

To enable others skilled in the art to make and practice my invention, I will describe the same more fully, referring to the accompanying drawings, in which- Figure 1 is a vertical section of a flask, showing the patterns therein. Fig. 2 is a like view with the patterns removed, the several cores inserted in their respective seats. Fig. 3 is a bottom view showing the mold-cavities connected by the dierent runners diverging from the central runner. Fig. 4 is a top view of the bottom core. Fig. 5 is a sectional view of the flask with the pattern therein, and Fig. 6 is a view of the finished mold for forming castings having enlargements at their smaller ends.

Like letters of reference indicate like parts in each.

In the drawings I have illustrated my invention in connection with the casting of wagon-boxes, though it is equally applicable to other tubular articles of a like nature. The flask a is of the ordinary construction, being usually formed of metal, and to form the molds in the ask a pattern-plate l), carrying a cluster of patterns c, is employed, the flask resting upon the pattern-plate and the patterns extending` up within the flask. These patterns c are secured to the bottom core-pattern d, which extends up from the patternplate b, so as to enter Within the flask and form a core-seat CZ therein, surrounding the entire space in which the molds are formed; The patterns c are only for the formation of the mold-cavities proper f by means of the main bodies thereof and of the point-prints of the cores by means of the portions c', the seats for the heads or cope-prints of the cores being formed in the core 'entering the coreseat d', as hereinafter described. Extending up from the center of the pattern-plate b is the runner-pattern b', which rises to the top of the fiask and forms the runner or pouringgate b2 for pouring' the metalto the mold.

The pattern-plate b has the ribs e formed on the top of bottom core-pattern d, said ribs extending from the base of the runner-pattern b in all direct-ions, leading to the patterns c, so as to form runners e to feed the metal from the center runner to the mold. At the upper end of each pattern c is a suitably-shaped print-pattern c for forming the core-print for the corresponding print or bearing It at the upper or smaller end of the mold-core k, the core print formed being slightly tapering, so as to guide the cores more readily to place.

The molds formed by the patterns above described have the ordinary mold-cavities f, with the core seats or prints f at the upper ends thereof and the bottom core-seat d below the same, in which the bottom core g is seated, the heads 7a2 of the cores 7c being seated therein, as hereinafter described. The bottom core g has the seats or cavities h formed therein, said seats being slightly tapering and being directly under the mold-cavities f and corresponding in shape to the heads k2 of the mold-cores. If desired, the runners e may.

be formed on the uppersurface of the bottom core g; but they are more conveniently formed in the mold, as shown.

In forming the molds in accordance with my invention the patterns extend up within the body of the flask, and the sand is then introduced and rammed or jarred around the IOO patterns. The runner-pattern b is then withdrawn, and the pattern-plate b with its patterns c and d withdrawn, leaving the moldcavities f connected with the central runner or pouring-gate h2 by the runners e', formed by the ribs e, and the bottom core-seat d below them. The bottom core g is placed in t-he core-seat d, and the cores 7c are then inserted until the point prints or bearings 7c at the upper end thereof fit into the core-prints f of the mold-cavities f, while the heads 7a2 at the lower ends of said cores fit snugly within the seats h of the bottom core g and serving as copes for the mold-cavities. The bottom board is then placed over the bottom core g and the flask inverted, when the mold is ready for casting. During the casting operation lthe metal will flow down through the pouring-gate h until it comes in contact with the bottom core g, whence it will be delected in all directions throughk the runners e', which connect the central pouring-gate b with all the mold-cavities, and the metal will rise within the mold-cavities, forming perfect and solid molds.

In Figs. 5 and 6 are shown a pattern for forming a complete mold,in which the smaller ends of the cores are seated in the large bottom core, and the heads of the cores are seated at the upper end of' the mold when it is poured. Such form of. mold has special advantages in forming certain castings having enlargements at the lower end-such as certain styles of wagon-boxes-as the cavities for the eniargements may be formed in the bottom core, as shown at s in Fig. 6, the seat for the smaller end of the core being below such cavity and the runner feeding the metal to the mold-cavity in such Way that it will descend into the cavity s within the bottom core, but rise into the main portion of the mold-cavity.

It is readily apparent that by the employment of the above form of moldI am enabled to form a large number of moldsthat is, two or more rows or series of molds in a single flask-and providefor the formation ofthe side runners from the central runner to the several mold-cavities, and also provide for the pouring of the molds so that the metal will rise therein without permitting it to come in 5o contact with the bottom board or drag. At th'e same time the cores are properly seated, the large bottom core serving to bring the mold-cores in proper alignment with the moldvcavities, thus insuring perfect castings.

' lVhat I claim' aspmy invention, and desire to secure by Letters Patent, is-

l. A mold for tubular articles having formed in the same body of sand a series of moldcavities, a pouring-gate extending vertically 6o through the body of sand, a core-seat below said pouring-gate and mold-cavities, and a bottom core fitting Within said seat and having a number of seats formed therein for the reception of the lower bearings of the moldcores, substantially as and for the purposes set forth.

2. A mold for tubular articles having formed in the same body of sand a series of moldcavities, a pouring-gate extending vertically 7o through the body of sand and side runners leading therefrom to the different mold-cavities, a core-seat below7 said'mold-cavities, and a bottom core fitting within said seat and having a number of seats formed therein for the reception of the lower bearing of the moldcores, substantially as and for the purposes set forth.

3. A mold for tubular articleshaving formed in the same body of sand aseriesof mold- 8o cavities, a pouring-gate extending vertically through the body of sand and a core-seat below said pouring-gate and mold-cavities, and a bottom core fitting within said core-seat and having a number of cavities below the main mold-cavities and forming continuations of the same, substantially as and for the purposes set forth.

In testimony whereof I, the said STEPHEN JARVIS ADAMS, have hereunto set my hand.

STEPHEN JARVIS ADAMS.

Witnesses: I

J N. COOKE, RoBr. D. TOTTEN. 

